link to lecture transcript - UT-H GSBS Medical Physics Class Site

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In this graph we see the differential angular cross section for Compton scatter as a function of scatter angle. Thompson scatter is the curve that’s symmetric in angle, Rayleigh scatter peaks at low angle scatter. 42
Note that this graph is for very low energy photons incident on a low-Z target, 10 keV photons incident on carbon. Coherent scatter at these low energies is significant and stronger than Compton scatter. Also the binding energy has a significant effect on Compton scatter at these low energies and that Compton scatter approaches the classical limit. 43
Page 1 and 2: Today, we continue our talk about C
Page 3 and 4: We previously derived an equation f
Page 5 and 6: So σ 0 is the classical cross sect
Page 7 and 8: Let’s look at this graph. Notice
Page 9 and 10: What about the dependence of the Co
Page 11 and 12: The energy transferred to the elect
Page 13 and 14: If we plot the energy transfer coef
Page 15 and 16: The energy transfer coefficient has
Page 17 and 18: What about the scatter coefficient?
Page 19 and 20: Using this equation we can now plot
Page 21 and 22: This probability is represented by
Page 23 and 24: This figure is a plot taken from Jo
Page 25 and 26: We can always calculate what the ma
Page 27 and 28: Remember dσ/dE is relatively const
Page 29 and 30: Now we also look at the graph and s
Page 31 and 32: First, let’s recall that the atte
Page 33 and 34: What we now want to find out is how
Page 35 and 36: So far, our approximations have bee
Page 37 and 38: These values were tabulated by Hubb
Page 39 and 40: So what is the effect of binding en
Page 41: At higher energies there is no diff
Page 45: The fraction of energy transferred

link to lecture transcript - UT-H GSBS Medical Physics Class Site

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